This isn't very good. Special containment procedures use the wrong numbering system(use metric), are overly specific and trips up on itself, resulting in a cell with dimensions no average sized human being could live in. You have pieces of paper being terminated by MTF units when a shredder or fire could technically still do the job, and you gag this thing with…a ball-gag.

It doesn't get much better in the description where clinical tone and grammar disappear. For example,

When SCP-XXXX speaks, it’s power entrances all humanoids in the vicinity that can hear an estimated 80 to 95 it and begin to rot in there place. SCP-XXXX’s rot seems to be a un-natural form of decaying rot as if you from from you brain to your toes, but it takes a very long time for its powers to destroy the human brain.

Not only does this suddenly switch to second person, but there are left out units and the constant references to this being a "power" give off a real strong X-Man vibe.

You dedicate whole sections to the capture and theories of this SCP, as well as an individual description for the papers it creates. These are too short to deserve entire sections and suffer from the same issues outlined above.

Remember, the Foundation is a detached and professional entity. The writing it produces is expected to consistently mirror that effect unless compromised by the SCP. Your SCP does not have this ability. Traits of this style of writing include the lack of second or first person writing,

We believe

the lack of emotional investment,

thankfully foundation personnel had time to save 87% of the audience

and the lack of vague terms

SCP-XXXX’s rot seems to be a un-natural form of decaying rot as if you from from you brain to your toes, but it takes a very long time for its powers to destroy the human brain.

(How long is a very long time?)

The dialogue is incomprehensible because of the SPaG errors

Well i thinks this is it Have fun with them and Oh tell your wife █████ that I said hi

As regards as to what is actually being said here, and in the closing statement, it doesn't sound really interesting and I can't say it sounds professionally written or organized. I recommend going through your own writing to catch SPaG errors, and also thoroughly reading through the guides to get a sense for the tone and style expected here.

This is an X-Man who can rot people by talking to them or having them read his writing, and he knows a lot about the Foundation. This isn't really an interesting concept at all as a result. Humanoids are inherently very difficult to write and I recommend checking out the guide dedicated to them so you can better understand how to write one. Once you do that, I recommend getting this concept checked in the Ideas and Brainstorming forum. The users there will let you know how to make your SCP more interesting, and tell you which parts can safely be cut out. They might even give you a better idea that you didn't think of before.

thx for the feed back i put it in grammerly and i guess i took stuff out of the sentences u pointed out and thx again for the feedback i know its a few months late.
and i'm still working to fix my issues